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    <title>Document</title>
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<body>
    <script>
        function createIncrementor(num){

            function fn(){
                num++
                 return num
            }
            // fn()

            return fn

        }

        
//实现以下效果
const incrementor = createIncrementor(10);
console.log(incrementor()); // 11
console.log(incrementor()); // 12
console.log(incrementor()); // 13
    </script>
</body>
</html>